98 THE CANADIAN ENTOMOLOGIST. 



NOTES ON SOME CHALCIDOIDEA. 



BY J. C. CRAWFORD, BUREAU OF ENTOMOLOGY, WASHINGTON, D. C. 



Megorismus Fletcheri, n. sp. — 9. Length, 1.50-1.75 mm. Bronzy- 

 green ; abdomen black, obscurely bluish or greenish ; antenna; black, 

 scape metallic ; face in front of ocelli smooth, polished, the rest of the 

 head reticulated ; head and thorax with sparse long hairs, each set in a 

 puncture ; thorax reticulated, posterior margin of prothorax, parapsidal 

 areas laterally, and scutellum back of the transverse furrow, smooth ; 

 metathorax rugose, with a short median carina and a smooth space on 

 each side near the base ; wings yellowish, nervures honey-colour ; coxae 

 metallic, the rest of the legs testaceous ; petiole stout, longitudinally rugose; 

 abdomen smooth. 



cJ . Length, 1.50 mm. Similar to the female; the fiagellum, how- 

 ever, light brownish. 



Habitat. — Ottawa, Canada. Bred from Nectarophora pisi. (Arthur 

 Gibson, collector.) 



Type No. 12197, U. S. N. M. 



Paratypes in collection Central Experimental Farm, Ottawa, Can. 



Dedicated to the memory of the late Dr. Fletcher. 



Hkmadas, new genus. 



Type Megorismus nubilipennis, Ashm. 



This genus belongs to the tribe Metaste/iini, Ashmead, and is dis- 

 tinguished by the following characters: Antennae 13-jointed, with two 

 ring-joints, mandibles two-toothed, clypeus at apex slightly emarginate, 

 antennae slightly clavate ; marginal vein normal. 



The following table, which includes the above new genus, will 

 separate the females of the various genera assigned to the tribe by Dr. 

 Ashmead, and correct some errors in the table given by him in the Classi- 

 fication of the Chalcidoidea : 



1. Last joint of antennae spine-like Picroscytus, Thorns. 



= Stylophorella, Ashm. 

 Last joint of antennae normal 2. 



2. Marginal vein thickened 3- 



Marginal vein not thickened 4- 



3. Antenna* 13-jointed Xenocrepis, Fbrst. 



Antennae 1 2-jointed Disema, Forst 



4. Antennae with one ring-joint Arthro/ysis, Forst. 



Antennae with more than one ring-joint 5- 



March, igoy 



